MGBA	Microbiota–gut–brain axis
LPS	Lipopolysaccharide
CNS	Central nervous system
BBB	Blood–brain barrier
FMT	Fecal microbiota transfer
TMAO	Trimethylamine-N-oxide
SCFAs	Short-chain fatty acids
AD	Alzheimer’s disease
GFP	Green fluorescent protein
IHC	Immunohistochemistry
IF	Immunofluorescence